Bedienungsanleitung Yaesu FT-991 (Seite 23 von 154) (Englisch)

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T-991

OperaTing Manual

front panel controls & switches

Main Tuning Dial Knob

This large knob adjusts the operating frequency of

VFO-A.

Rotate clockwise to increase the operating frequency

and rotate counter-clockwise to decrease the operat-

ing frequency.

operAting Mode 1 Step 1 diAl rotAtion

LSB/USB/CW/RTTY/

DATA-LSB/DATA-

USB/AM

5 Hz (100 Hz)

10 Hz (100 Hz)

1 kHz (200 kHz)

2 kHz (20 kHz)

FM/DATA-FM/C4FM 100 Hz (1 kHz) 20 kHz (200 kHz)

Numbers in parentheses indicate steps when the FAST button is On.

Advice:

The tuning steps for the Main Dial knob are set

at the factory to: 10Hz (SSB/AM), 5 Hz (CW/

RTTY/DATA-LSB/DATA-USB) and 100 Hz (FM/

DATA-FM/C4FM) per step.

In LSB, USB, CW, RTTY, DATA-LSB or DATA-

USB mode, the frequency change amount (step

width) may be toggled between “

5Hz

” and “

10Hz

”

by pressing the

F(M-LIST)

button, and then touch-

ing [

5/10Hz

] on the LCD.

FAST Button

Pressing this button will change the tuning of the

Main Tuning Dial knob (VFO-A) to a higher step

rate.

Press this button to double the main dial frequency

variation. “

” in the LED indicator area will light

up.

Press this button again to restore the frequency varia-

tion to the original value. “

” will disappear.

LOCK Button

This button toggles on/off locking of the Main Tun-

ing Dial knob.

Press this button to lock the main dial operations.

“ ” will light up in the LED indicator area.

Press this button again to unlock the main dial opera-

tions. “ ” will disappear.

CLAR Button

During reception, press this button, then rotate the

CLAR/VFO-B

knob to adjust the VFO-A

RX clarier offset value (see page 34).

The clarier offset value (frequency) can be re-

stored to “0 (zero)” by pressing the

CLAR

button

for more than 1 second.

Depending on the menu mode “

040 CLAR

MODE SELECT

” setting, this button can work as

the TX clarifier for changing only the transmit

frequency (see page 73) or RX/TX clarifier for

both receiving and transmitting (see page 34,

73).

V/M Button

This button toggles frequency control between VFO-

A and the memory system.

Pressing this button alternately recalls the VFO

frequency data and the frequency data saved in a

memory channel by turns.



M Button

Pressing and holding this key for one second (until

the double beep) copies the current operating data

into the currently selected memory channel, over-

writing any previous data stored there.

Press this button briey to display the memory check

function screen, where the data saved in a memory

channel may be reviewed.

While displaying memory data, rotate the

MULTI

knob to review the data in each memory channel.

Press this button again, to close the memory list

screen.

SPLIT Button

Press this button to operate split frequency between

VFO-A (used for reception) and VFO-B (used for

transmission) (see page 74).

Press and hold in the

SPLIT

button for one sec-

ond to engage the “Quick Split” (see page 74)

feature. VFO-B transmit will automatically be

set to a frequency 5 kHz higher than the VFO-A

receive frequency, with the same operating mode.

The transceiver will operate in the Split mode.

CLAR/VFO-B Knob

During the VFO-A operation, rotate this knob to ad-

just the clarier.

During Split operation, this knob adjusts the operat-

ing frequency of VFO-B.

RF GAIN Knob

Adjust the receiver gain of the high frequency and

mid-range frequency amplier stages.

Rotate the knob clockwise to increase the gain.

Rotate the knob fully clockwise to set the gain to

the highest level for normal operations.

AF GAIN Knob

The

AF GAIN

knob sets the receiver audio volume

level.

Rotate the knob clockwise to increase the receiv-

er audio volume level.

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